S. Hirose

activity

20162021

most citedThe Belle II Physics Book

570 citations · 1.8k across the 28 of their papers we have counts for

collaborators

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28 papers · 1 filter

hep-ex2021★ 3 cited

Search for the Decay $B_{s}^{0} \to η^{'} η$

Belle Collaboration, N. K. Nisar, V. Savinov +197

We report the results of the first search for the decay $B_{s}^{0} \to η^{'} η$ using $121.4 fb^{- 1}$ of data collected at the $Υ (5 S)$ resonance with the Belle dete…

hep-ex2020

Charmless $B$ decay reconstruction in 2019 Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +533

We report on the reconstruction of various charmless $B$ decays from electron-positron collisions at the energy corresponding to the $Υ (4 S)$ resonance collected with the Belle II d…

hep-ex2020

Measurement of the branching fraction $B (B ˉ^{0} \to D^{*+} ℓ^{-} ν ˉ_{ℓ})$ with early Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +533

We measure the branching fractions for the decays $B ˉ^{0} \to D^{*+} e^{-} ν ˉ_{e}$ and $B ˉ^{0} \to D^{*+} μ^{-} ν ˉ_{μ}$ using $8.70 \pm 0.09 fb^{- 1}$ of data collecte…

hep-ex2019★ 236 cited

Measurement of $R (D)$ and $R (D^{*})$ with a semileptonic tagging method

The Belle Collaboration, G. Caria, P. Urquijo +188

The experimental results on the ratios of branching fractions $R (D) = B (B ˉ \to D τ^{-} ν ˉ_{τ}) / B (B ˉ \to D ℓ^{-} ν ˉ_{ℓ})$ and $\mathcal{R}(D^…

hep-ex2019★ 134 cited

Test of lepton flavor universality and search for lepton flavor violation in $B \to K ℓℓ$ decays

S. Choudhury, S. Sandilya, K. Trabelsi +220

We present measurements of the branching fractions for the decays $B \to K μ^{+} μ^{-}$ and $B \to K e^{+} e^{-}$ , and their ratio ( $R_{K}$ ), using a data sample of 711 $f b^{- 1}$ that…

hep-ex2018★ 46 cited

Observation of $Ξ (1620)^{0}$ and evidence for $Ξ (1690)^{0}$ in $Ξ_{c}^{+} \to Ξ^{-} π^{+} π^{+}$ decays

Belle collaboration, M. Sumihama, I. Adachi +183

We report the first observation of the doubly-strange baryon $Ξ (1620)^{0}$ in its decay to $Ξ^{-} π^{+}$ via $Ξ_{c}^{+} \to Ξ^{-} π^{+} π^{+}$ decays based on a $980 fb^{- 1}$ data sa…

hep-ex2018★ 3 cited

Measurement of time-dependent $C P$ violation in $B^{0} \to K_{S}^{0} π^{0} π^{0}$ decays

Belle Collaboration, Y. Yusa, H. Aihara +155

We report a measurement of time-dependent $C P$ violation in $B^{0} \to K_{S}^{0} π^{0} π^{0}$ decays using a data sample of $772 \times 1 0^{6}$ $B B ˉ$ pairs collected by the Belle experime…

hep-ex2018★ 112 cited

Measurement of the CKM Matrix Element $∣ V_{c b} ∣$ from $B^{0} \to D^{*-} ℓ^{+} ν_{ℓ}$ at Belle

E. Waheed, P. Urquijo, I. Adachi +184

We present a new measurement of the CKM matrix element $∣ V_{c b} ∣$ from $B^{0} \to D^{*-} ℓ^{+} ν_{ℓ}$ decays, reconstructed with the full Belle data set of $711 f b^{- 1}$ i…

hep-ex2018★ 66 cited

Observation of Transverse $Λ/ Λ ˉ$ Hyperon Polarization in $e^{+} e^{-}$ Annihilation at Belle

Belle Collaboration, Y. Guan, A. Vossen +205

We report the first observation of the spontaneous polarization of $Λ$ and $Λ ˉ$ hyperons transverse to the production plane in $e^{+} e^{-}$ annihilation, which is attributed to the…

hep-ex2018★ 570 cited

The Belle II Physics Book

E. Kou, P. Urquijo, W. Altmannshofer +524

We present the physics program of the Belle II experiment, located on the intensity frontier SuperKEKB $e^{+} e^{-}$ collider. Belle II collected its first collisions in 2018, and is ex…

hep-ex2018

Study of charmless decays $B^{\pm} \to K_{S}^{0} K_{S}^{0} h^{\pm}$ ( $h = K, π$ ) at Belle

The Belle Collaboration, A. Abdesselam, I. Adachi +449

We report a search for charmless hadronic decays of charged $B$ mesons to the final states $K_{S}^{0} K_{S}^{0} K^{\pm}$ and $K_{S}^{0} K_{S}^{0} π^{\pm}$ . The results are based o…

hep-ex2018★ 5 cited

Observation of $B^{+} \to p Λ ˉ K^{+} K^{-}$ and $B^{+} \to p ˉ Λ K^{+} K^{+}$

P. -C. Lu, M. -Z. Wang, R. Chistov +200

We report the study of \OK \ and \SK \ using a $772 \times 1 0^{6}$ $B B ˉ$ pair data sample recorded on the $Υ (4S)$ resonance with the Belle detector at KEKB. The following…

hep-ex2018★ 9 cited

Search for the lepton-flavor-violating decay $B^{0} \to K^{* 0} μ^{\pm} e^{\mp}$

Belle Collaboration, S. Sandilya, K. Trabelsi +211

We have searched for the lepton-flavor-violating decay $B^{0} \to K^{* 0} μ^{\pm} e^{\mp}$ using a data sample of 711 $f b^{- 1}$ that contains $772 \times 1 0^{6}$ $B B ˉ$ pairs…

hep-ex2018★ 5 cited

Observation of $Υ (2 S) \to γ η_{b} (1 S)$ decay

Belle Collaboration, B. G. Fulsom, T. K. Pedlar +196

We report the observation of $Υ (2 S) \to γ η_{b} (1 S)$ decay based on analysis of the inclusive photon spectrum of $24.7$ fb $^{- 1}$ of $e^{+} e^{-}$ collisions at the $Υ (2 S)$ center-of-mass…

hep-ex2018★ 30 cited

Evidence of a structure in $K ˉ^{0} Λ_{c}^{+}$ consistent with a charged $Ξ_{c} (2930)^{+}$ , and updated measurement of $B ˉ^{0} \to K ˉ^{0} Λ_{c}^{+} Λ ˉ_{c}^{-}$ at Belle

Belle Collaboration, Y. B. Li, C. P. Shen +175

We report evidence for the charged charmed-strange baryon $Ξ_{c} (2930)^{+}$ with a signal significance of 3.9 $σ$ with systematic errors included. The charged $Ξ_{c} (2930)^{+}$ is found…

hep-ex2018★ 6 cited

Observation of $e^{+} e^{-} \to π^{+} π^{-} π^{0} χ_{b 1, 2} (1 P)$ and search for $e^{+} e^{-} \to ϕ χ_{b 1, 2} (1 P)$ at $s =$ 10.96---11.05 GeV

J. H. Yin, C. Z. Yuan, I. Adachi +187

We report searches for the processes $e^{+} e^{-} \to π^{+} π^{-} π^{0} χ_{b J}$ and $e^{+} e^{-} \to ϕ χ_{b J}$ (J=1,2) based on data samples collected by the Belle experiment at the KEKB collider. We repo…

hep-ex2018★ 63 cited

Observation of an excited $Ω^{-}$ baryon

J. Yelton, I. Adachi, J. K. Ahn +189

Using data recorded with the Belle detector, we observe a new excited hyperon, an $Ω^{*-}$ candidate decaying into $Ξ^{0} K^{-}$ and $Ξ^{-} K_{S}^{0}$ with a mass of $2012.4\pm0.7\ {\rm (stat)…

hep-ex2018★ 7 cited

Measurement of the branching fraction of $B \to D^{(*)} π ℓ ν$ at Belle using hadronic tagging in fully reconstructed events

A. Vossen, I. Adachi, K. Adamczyk +157

We report a measurement of the branching fraction of the decay $B \to D^{(*)} π ℓ ν$ . The analysis uses 772 $\times 1 0^{6}$ $B B ˉ$ pairs produced in $e^+e^-\rightarrow Υ(4…

hep-ex2017★ 232 cited

Measurement of the $τ$ lepton polarization and $R (D^{})$ in the decay $B ˉ \to D^{} τ^{-} ν ˉ_{τ}$ with one-prong hadronic $τ$ decays at Belle

S. Hirose, T. Iijima, I. Adachi +181

With the full data sample of $772 \times 1 0^{6}$ $B B ˉ$ pairs recorded by the Belle detector at the KEKB electron-positron collider, the decay $\bar{B} \rightarrow D^* τ^- \barν…

hep-ex2017★ 36 cited

Evidence for Isospin Violation and Measurement of $C P$ Asymmetries in $B \to K^{*} (892) γ$

T. Horiguchi, A. Ishikawa, H. Yamamoto +190

We report the first evidence for isospin violation in $B \to K^{*} γ$ and the first measurement of difference of $C P$ asymmetries between $B^{+} \to K^{*+} γ$ and $B^{0} \to K^{* 0} γ$ . T…

hep-ex2017★ 36 cited

Precise determination of the CKM matrix element $∣ V_{c b} ∣$ with $B ˉ^{0} \to D^{* +} ℓ^{-} ν ˉ_{ℓ}$ decays with hadronic tagging at Belle

The Belle Collaboration, A. Abdesselam, I. Adachi +459

The precise determination of the CKM matrix element $∣ V_{c b} ∣$ is important for carrying out tests of the flavour sector of the Standard Model. In this article we prese…

hep-ex2016

Measurement of Michel Parameters ( $η ˉ$ , $ξ κ$ ) in the radiative leptonic decay of tau at Belle

The Belle Collaboration, A. Abdesselam, I. Adachi +445

We present the first measurement of the Michel parameters $η ˉ$ and $ξ κ$ in the radiative leptonic decay of the $τ$ lepton using 703 f $b^{- 1}$ of data collected with the…

hep-ex2016★ 14 cited

Measurement of $C P$ asymmetry in the $D^{0} \to K_{S}^{0} K_{S}^{0}$ decay at Belle

A. Abdesselam, I. Adachi, K. Adamczyk +447

We report a measurement of the time-integrated $C P$ asymmetry in the neutral charm meson decay $D^{0} \to K_{S}^{0} K_{S}^{0}$ using 921~fb $^{- 1}$ data collected at the $Υ (4 S)$ and $Υ (5 S)$ r…

hep-ex2016

Evidence for the decay $B^{0} \to η η$

A. Abdesselam, I. Adachi, K. Adamczyk +447

We report a search for $B^{0} \to η η$ with a data sample corresponding to an integrated luminosity of $698 fb^{- 1}$ containing $753 \times 1 0^{6}$ $B B ˉ$ pairs collected…

Search for the Decay Bs0​→η′η

Charmless B decay reconstruction in 2019 Belle II data

Measurement of the branching fraction B(Bˉ0→D∗+ℓ−νˉℓ​) with early Belle II data

Measurement of R(D) and R(D∗) with a semileptonic tagging method

Test of lepton flavor universality and search for lepton flavor violation in B→Kℓℓ decays

Observation of Ξ(1620)0 and evidence for Ξ(1690)0 in Ξc+​→Ξ−π+π+ decays

Measurement of time-dependent CP violation in B0→KS0​π0π0 decays

Measurement of the CKM Matrix Element ∣Vcb​∣ from B0→D∗−ℓ+νℓ​ at Belle

Observation of Transverse Λ/Λˉ Hyperon Polarization in e+e− Annihilation at Belle

The Belle II Physics Book

Study of charmless decays B±→KS0​KS0​h± (h=K,π) at Belle

Observation of B+→pΛˉK+K− and B+→pˉ​ΛK+K+

Search for the lepton-flavor-violating decay B0→K∗0μ±e∓

Observation of Υ(2S)→γηb​(1S) decay

Evidence of a structure in Kˉ0Λc+​ consistent with a charged Ξc​(2930)+, and updated measurement of Bˉ0→Kˉ0Λc+​Λˉc−​ at Belle

Observation of e+e−→π+π−π0χb1,2​(1P) and search for e+e−→ϕχb1,2​(1P) at s​=10.96---11.05 GeV

Observation of an excited Ω− baryon

Measurement of the branching fraction of B→D(∗)πℓν at Belle using hadronic tagging in fully reconstructed events

Measurement of the τ lepton polarization and R(D∗) in the decay Bˉ→D∗τ−νˉτ​ with one-prong hadronic τ decays at Belle

Evidence for Isospin Violation and Measurement of CP Asymmetries in B→K∗(892)γ

Precise determination of the CKM matrix element ∣Vcb​∣ with Bˉ0→D∗+ℓ−νˉℓ​ decays with hadronic tagging at Belle

Measurement of Michel Parameters (ηˉ​, ξκ) in the radiative leptonic decay of tau at Belle

Measurement of CP asymmetry in the D0→KS0​KS0​ decay at Belle

Evidence for the decay B0→ηη